The meteors are connected to the comet Tempel-Tuttle, which was discovered by German astronomer Ernst Wilhelm Tempel and American astronomer Horace P ... Both astronomers discovered the comet independently ... For example, the “crumbs” left behind from Halley’s Comet trail are meteoroids....

But Spitzer tracks asteroids and comets using the infrared energy, or heat, that they radiate, which can provide more specific information about an object’s size than optical observations of reflected sunlight alone would....

But Spitzer tracks asteroids and comets using the infrared energy, or heat, they radiate, which can provide more specific information about an object's size than optical observations of reflected sunlight alone would, said the paper....

The meteors are connected to the comet Tempel-Tuttle, which was discovered by German astronomer Ernst Wilhelm Tempel and American astronomer Horace P ... Both astronomers discovered the comet independently ... For example, the “crumbs” left behind from Halley’s Comet trail are meteoroids....

3200 Phaethon, the bizarre rock responsible for the Geminid meteor shower, may have split from a much greater asteroid millions of years ago ...Pallas is a bit of an oddball in the asteroid belt ... It also has a highly elongated orbit; with an eccentricity of 0.88, its orbit is more like a comet than an asteroid ... A tale of two asteroids....

Comets, which hold a lot of ice, could have supplied some of our planet’s water; asteroids, though they hold less water, could have added to Earth’s supply as well ...Asteroid water has a D/H of about 140 ppm and water from comets ranges from 150 ppm to 300 ppm ... Much of the rest comes from asteroids, and some from comets....

Meech and Weryk were co-authors of a Nature study with European and UH colleagues in June that declared the object was a comet rather than an asteroid, as it was originally classified ... There was no evidence of an atmosphere or tail like a comet, according to the
paper....

Planet Earth is set for a close encounter with an ominous, skull-shaped object called the ‘HalloweenDeathComet’ this weekend ... The ominous object is thought to be ‘dead’ and is likely to be the ghost of a comet which was killed by the Sun ... An asteroid is generally made of rock or metal, while a comet consists of ice and rock....